Reactive wetting and filling of boron nitride nanotubes by molten aluminum during equilibrium solidification

Nautiyal, Pranjal; Gupta, Ankur; Seal, Sudipta; Boesl, Benjamin; Agarwal, Arvind

doi:10.1016/j.actamat.2016.12.034

Cited by 57 publications

(45 citation statements)

References 64 publications

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“…13. the surface tension of Al and T is temperature. For 700 °C, surface tension of Aluminum will be 870 mN/m[90]. Surface energy of WS2 is 40 mJ/m 2[91].Higher differences between surface tension of Al and surface energy of Ws2 accordantly with Eq.…”

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confidence: 54%

Effect of Ultrasonic Treatment on the microstructure and mechanical properties of Al6061 and composite

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for all your guidance, help, support and friendship during the preparation of this thesis. For this past year and a half working in the PFL group, all of you have become more than coworkers for me, and I am so glad that I had the opportunity to meet all of you. Most importantly, I'd like to thank my family and friends that support me since the first day I came to FIU. I'm thankful to my parents for always supporting me and encouraging me to follow my dreams. My brother David and my sister Karla, who motivated me to pursue my master's degree. I would also like to thank to Nohelis Montano, Mauricio Trigo, Viviana Ojeda y Alberto Pernas our friendship has kept us together for years since we were in Venezuela, thanks for been here for me when I needed help and support.

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Effect of Ultrasonic Treatment on the microstructure and mechanical properties of Al6061 and composite

Exime¹

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“…Boron Nitride Nanotubes (BNNTs) have proven great potential as reinforcing nanoparticles in low melting point metal matrices (i.e., Aluminum) by providing high strength-to-weight ratios [2][3][4][5] . The main challenge revolving the reinforcement of higher melting point metal matrices such as Titanium lies in the survival of the reinforcing nanoparticles.…”

Section: Chapter I: Introductionmentioning

confidence: 99%

Boron Nitride Nanotube–Reinforced Titanium Composite with Controlled Interfacial Reactions by Spark Plasma Sintering

Bustillos

Nautiyal

et al. 2020

Adv Eng Mater

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In this study, Boron Nitride Nanotube (BNNT) reinforced Titanium matrix composites are synthesized by Spark Plasma Sintering. Two main challenges directly affecting the mechanical performance of BNNT-metal matrix composites are addressed:(i) Homogenous dispersion of high surface energy BNNTs, and (ii) Controlling interfacial reactions at the metal/nanotube interface. High affinity of acetone with BNNTs and high energy ultrasonication induced the mechanical dispersion and stability of BNNTs in their dispersion. The sintering of Ti (99% relative density) was achieved at 50% less processing temperature than those used in conventional sintering to minimize interfacial reactions when reinforced with BNNTs. The reduction of temperatures in addition to the reduction (by 91%) in processing times was shown to control reaction phases. Bulk compressive yield strengths of Ti-BNNT sintered at low (750 o C) and high (950 o C) temperatures were improved by 21% and 50% respectively, as compared to Ti alloy without reinforcement. Twin boundaries, pinning of dislocations by BNNTs, and crack bridging were strengthening mechanisms identified in the composites. vi TABLE OF CONTENT CHAPTER

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“…Furthermore, such a supernormal wetting phenomenon was also observed in the fabrication of composite materials. Nautiyal et al [ 15 ] used a molten route method to fabricate the Al/BN (boron nitride) composite materials in the air at 973 K. They observed that a layer of the AlN had formed on the surface of the BN, as a result of the interface reaction, which led to a tight combination with the Al. The perfect wetting of Al on AlN is key to the successful fabrication of the Al/BN composite materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of AlN(0001) Surface Reconstructions on the Wettability of an Al/AlN System: A First-Principle Study

2018

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A successful application of a hot dip coating process that coats aluminum (Al) on aluminum nitride (AlN) ceramics, revealed that Al had a perfect wettability to the ceramics under specific circumstances, which was different from previous reports. In order to elucidate the mechanism that controlled the supernormal wetting phenomenon during the dip coating, a first-principle calculation of an Al(111)/AlN(0001) interface, based on the density functional theory (DFT), was employed. The wettability of the Al melt on the AlN(0001) surface, as well as the effect that the surface reconstruction of AlN and the oxygen adsorption had on Al for the adhesion and the wettability of the Al/AlN system, were studied. The results revealed that a LCM (laterally contracted monolayer) reconstruction could improve the adhesion and wettability of the system. Oxygen adsorption on the free surface of Al decreased the contact angle, because the adsorption reduced of the surface tension of Al. A prefect wetting was obtained only after some of the oxygen atoms adsorbed on the free surface of Al. The supernormal wetting phenomenon came from the surface reconstruction of the AlN and the adsorption of oxygen atoms on the Al melt surface.

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Reactive wetting and filling of boron nitride nanotubes by molten aluminum during equilibrium solidification

Cited by 57 publications

References 64 publications

Effect of Ultrasonic Treatment on the microstructure and mechanical properties of Al6061 and composite

Effect of Ultrasonic Treatment on the microstructure and mechanical properties of Al6061 and composite

Boron Nitride Nanotube–Reinforced Titanium Composite with Controlled Interfacial Reactions by Spark Plasma Sintering

Influence of AlN(0001) Surface Reconstructions on the Wettability of an Al/AlN System: A First-Principle Study

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